radiology ra·di·ol·o·gy (rā'dē-ŏl'ə-jē)
The branch of medicine that deals with the use of radioactive substances in diagnosis and treatment of disease.
The use of ionizing radiation for medical diagnosis, especially the use of x-rays in medical radiography or fluoroscopy.
The use of radiation for the scientific examination of material structures; fluoroscopy.
The branch of medicine that deals with diagnostic images of anatomic structures through the use of electromagnetic radiation or sound waves and that treats disease through the use of radioactive compounds. Radiologic imaging techniques include x-rays, CAT scans, PET scans, MRIs, and ultrasonograms.